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Question: fyi, internal error generated by odetest on series solution

Question:fyi, internal error generated by odetest on series solution

nm 8552 Maple 2022
ode differential-equations odetest
July 23 2022
0

To Maple support,. 

fyi,

internal error generated on this ode when trying odetest
 

> 

interface(version);

`Standard Worksheet Interface, Maple 2022.1, Windows 10, May 26 2022 Build ID 1619613`

> 

restart;
> 

ode:=x^3*diff(y(x),x$3)+x^2*diff(y(x),x$2)-3*x*diff(y(x),x)+(x-1)*y(x)=0;
sol:=dsolve(ode,y(x),'series',x=0):
odetest(sol,ode,'series','point'=0);

x^3*(diff(diff(diff(y(x), x), x), x))+x^2*(diff(diff(y(x), x), x))-3*x*(diff(y(x), x))+(x-1)*y(x) = 0

Error, (in odetest/series) complex argument to max/min: 1/4800*((-79*I+3*83^(1/2))*3^(1/2)+9*I*83^(1/2)-79)*(316+12*83^(1/2)*3^(1/2))^(2/3)+1/12*I*(316+12*83^(1/2)*3^(1/2))^(1/3)*3^(1/2)-1/12*(316+12*83^(1/2)*3^(1/2))^(1/3)+20/3


 

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